BiblioVault may have an electronic file which would meet your requirements for this title:
Aquatic and Wetland Plants of Northeastern North America, Volume II: A Revised and Enlarged Edition of Norman C. Fassett's A Manual of Aquatic Plants, Volume II: Angiosperms: Monocotyledons
Garrett E. Crow and C. Barre Hellquist
Paper: 978-0-299-16284-9
Cloth: 978-0-299-16280-1
Electronic: 978-0-299-16283-2